How much voltage/current gets through an ESC

Thread Starter


Joined Jan 31, 2019
I've been looking all over the place and can't seem to find a solid answer. My question is - how much voltage/current gets through an ESC to a brushless motor? More specifically, I'm pretty sure the current varies with the load, but the voltage doesn't? For example, if I have an 11.1v battery with 60 amp potential, the motor will receive 11.1 volts and a variable amount of current depending on the load? Is this correct?


Joined Apr 11, 2010
In general, yes!
A common misconception, of which I’m pretty sure you aren’t making, is that a load only draws the current it needs. That is, if you have a 12V 5A power supply, the load doesn’t get 5A. That rating doesn’t represent what is forced into a load; it is the maximum current the supply CAN give.


Joined Nov 11, 2019
The average voltage will change with the speed controller setting. The amps drawn are proportional to the torque the motor is loaded with.